Air extractor

Abstract

The invention provides an air extractor which comprises a suction cup and a vacuum pump, the suction cup comprises a flexible part and a base, a through air hole is formed in the base in the thickness direction of the suction cup, a first convex ring, a second convex ring and a third convex ring are arranged on the adsorption face of the flexible part, the second convex ring surrounds the first convex ring, and the third convex ring surrounds the second convex ring; in the thickness direction, the second convex ring protrudes out of the first convex ring and the third convex ring; the first convex ring surrounds to form a first space, and the first space penetrates through the flexible part and is connected with the air hole; a second space is formed between the second convex ring and the first convex ring, and a third space is formed between the third convex ring and the second convex ring; a first notch is formed in the first convex ring, and the second space is communicated with the first space through the first notch; a second notch is formed in the second convex ring, and the third space is communicated with the second space through the second notch; a third notch is formed in the third convex ring, and the third space is communicated with the peripheral space of the suction cup through the third notch; the vacuum pump communicates with the air holes.

Description

Technical Field

[0001] The present disclosure relates to the field of vacuum technology, and in particular to a vacuum device. Background Art

[0002] Vacuum-release self-adsorption boxes are a type of storage and transportation tool designed specifically for sheet-like items such as surface-mount components, chips, and ceramic wafers. When storing sheet items, the self-adsorption film on the vacuum-release self-adsorption box automatically adsorbs them. To remove the sheet items, a vacuum pump is required to remove the air inside, creating a negative pressure environment. The pressure differential between the inside and outside causes the self-adsorption film to deform, achieving the automatic release function.

[0003] While vacuum pumping equipment integrated into automated production lines is now well established, small, portable, automated vacuum pumping equipment is still needed in non-production line scenarios. However, commonly used portable vacuum pumping equipment currently has many drawbacks, such as manual operation, low automation levels, air leaks, complex internal structures, and high costs.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the Invention

[0005] The purpose of the present disclosure is to provide an air extraction device, which improves the air tightness of vacuum adsorption and has a high degree of automation.

[0006] According to one aspect of the present disclosure, there is provided an air extraction device, comprising:

[0007] The suction cup comprises a flexible member and a base, the flexible member being fixed on the base; a penetrating air hole is provided on the base along the thickness direction of the suction cup, the side of the flexible member facing away from the suction cup along the thickness direction is an adsorption surface, a first convex ring, a second convex ring and a third convex ring are provided on the adsorption surface of the flexible member, the second convex ring surrounds the first convex ring, and the third convex ring surrounds the second convex ring; in the thickness direction, the second convex ring protrudes from the first convex ring and the third convex ring; a first space is formed around the first convex ring, the first space passes through the flexible member and is connected to the air hole; a second space is formed between the second convex ring and the first convex ring, and a third space is formed between the third convex ring and the second convex ring; a first notch is provided on the first convex ring, and the second space is connected to the first space through the first notch; a second notch is provided on the second convex ring, and the third space is connected to the second space through the second notch; a third notch is provided on the third convex ring, and the third space is connected to the peripheral space of the suction cup through the third notch;

[0008] A vacuum pump is connected to the air hole.

[0009] In an exemplary embodiment of the present disclosure, a cavity is formed on the base, and the flexible member includes a first flexible portion and a second flexible portion connected together along the thickness direction, the first flexible portion is located on the base and fills the cavity; the first convex ring, the second convex ring and the third convex ring are formed on the second flexible portion.

[0010] In an exemplary embodiment of the present disclosure, along the height direction, the width of the cavity at a portion away from the flexible member is greater than the width of the cavity at a portion close to the flexible member.

[0011] In an exemplary embodiment of the present disclosure, the first flexible portion is formed by injecting a flexible polymer liquid into the cavity and then curing the liquid, and the second flexible portion is connected to the first flexible portion before the first flexible portion is cured.

[0012] In an exemplary embodiment of the present disclosure, in the thickness direction, the first protruding ring is flush with the third protruding ring.

[0013] In an exemplary embodiment of the present disclosure, in the circumferential direction of the suction cup, the first notch and the second notch are staggered, the second notch and the third notch are staggered, and the third notch corresponds to the first notch in position.

[0014] In an exemplary embodiment of the present disclosure, along the radial direction of the suction cup, the first protruding ring, the second protruding ring, and the third protruding ring have the same width.

[0015] In an exemplary embodiment of the present disclosure, along the radial direction of the suction cup, the width of the gap between the first convex ring and the second convex ring is the same as the width of the gap between the third convex ring and the second convex ring.

[0016] In an exemplary embodiment of the present disclosure, the suction cup further includes a connecting head connected to a side of the suction cup facing away from the flexible member, and a channel in the connecting head is connected to the air hole.

[0017] In an exemplary embodiment of the present disclosure, the air extraction device further includes a shell, the vacuum pump is disposed in the shell, and a shock absorber is filled between the vacuum pump and the inner wall of the shell.

[0018] The present disclosure provides an exhaust device, in which a suction cup is used to dock with a vacuum release type self-adsorption box so that the air holes on the suction cup are connected to the exhaust holes of the vacuum release type self-adsorption box, thereby extracting the gas in the vacuum release type self-adsorption box through a vacuum pump, so that a negative pressure is formed in the vacuum release type self-adsorption box, so that the self-adsorption film is deformed by the internal and external pressure difference, thereby realizing the automatic release function. In detail, when the suction cup is docked with the vacuum release type self-adsorption box, the vacuum release type self-adsorption box is first placed on the suction cup, and the suction cup and the box body form a semi-enclosed first space, a second space and a third space. The first space, the second space and the third space are connected to the external atmosphere through the first notch, the second notch and the third notch in turn. At the same time, there is an air hole at the bottom of the first space, and the air hole is connected to the vacuum pump; then the vacuum pump starts to evacuate and press the vacuum release type self-adsorption box down, and the notches on the first convex ring, the second convex ring and the third convex ring are squeezed and closed, and the semi-enclosed first space, the second space and the third space and the interior of the vacuum release type self-adsorption box 30 together become a closed space. The air pressure in the enclosed space decreases and stabilizes at a certain air pressure value (vacuum degree). The vacuum release type self-adsorption box is tightly adsorbed on the suction cup due to the air pressure difference (the external atmospheric pressure is higher than the air pressure in the enclosed space). The self-adsorption film is deformed inward due to the air pressure difference, thereby separating from the sheet on the film and achieving vacuum release. After the vacuum release is completed, the vacuum pump is turned off, and the extrusion force on the notch of the suction cup decreases until it disappears. The notches on the first convex ring, the second convex ring, and the third convex ring are reopened, and the enclosed space becomes a semi-enclosed space. External air automatically enters the semi-enclosed space, so that the air pressure inside the box reaches equilibrium with the external atmospheric pressure, the self-adsorption film returns to a flat state, and the vacuum release type self-adsorption box is no longer adsorbed on the suction cup, so the vacuum release type self-adsorption box can be removed.

[0019] In addition, in the thickness direction, the second convex ring protrudes from the first convex ring and the third convex ring, that is, the height of the second convex ring is relatively high. When the vacuum release type self-adsorption box is placed on the suction cup, the second convex ring first contacts the vacuum release type self-adsorption box and achieves a seal. Then, when vacuuming, the first convex ring and the third convex ring contact the vacuum release type self-adsorption box and achieve a seal, which can enable the flexible part and the vacuum release type self-adsorption box to be quickly adsorbed together; when the vacuum release type self-adsorption box needs to be removed, the third notch on the third convex ring can be separated from the vacuum release type self-adsorption box and opened before the second notch on the second convex ring, so that external air can quickly enter the third space between the third convex ring and the second convex ring, and then the other notches are opened, and the air enters the second space and the first space in turn, which can achieve the effect of rapid separation of the suction cup and the vacuum release type self-adsorption box.

[0020] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0022] Figure 1 A schematic diagram of an air extraction device provided in accordance with an embodiment of the present disclosure.

[0023] Figure 2 A schematic diagram of a suction cup provided in accordance with an embodiment of the present disclosure.

[0024] Figure 3 A schematic diagram of a suction cup adsorption vacuum release type self-adsorption box provided in an embodiment of the present disclosure.

[0025] Figure 4 A schematic diagram of a base and a connector provided for an embodiment of the present disclosure.

[0026] Figure 5 An exploded view of a base and a connector according to an embodiment of the present disclosure.

[0027] Figure 6 A schematic diagram of a flexible member provided in accordance with an embodiment of the present disclosure.

[0028] Figure 7 An exploded view of a flexible member provided in accordance with an embodiment of the present disclosure.

[0029] Figure 8 A schematic diagram of injecting a first flexible portion onto a base provided in an embodiment of the present disclosure.

[0030] Figure 9 A schematic diagram of the dimensions of a base cross section provided for an embodiment of the present disclosure.

[0031] Figure 10 A schematic diagram of the dimensions of the base and the cross-section of the flexible member provided for an embodiment of the present disclosure.

[0032] Figure 11 A schematic cross-sectional view of a base and a flexible member provided in accordance with another embodiment of the present disclosure.

[0033] Figure 12 A schematic diagram of an air extraction device provided in accordance with another embodiment of the present disclosure.

[0034] Figure 13 A schematic diagram of an air extraction device provided in accordance with another embodiment of the present disclosure.

[0035] Description of reference numerals:

[0036] 10. Suction cup; 11. Base; 110. Air hole; 111. Upper portion; 112. Lower portion; 12. Flexible member; 120. Cavity; 121. First protruding ring; 1210. First notch; 1221. Base layer; 1222. Top layer; 122. Second protruding ring; 1220. Second notch; 123. Third protruding ring; 1230. Third notch; 124. Base; 125. First flexible portion; 13. Connector; 130. Channel;

[0037] 21. Vacuum pump; 22. Ventilation tube; 23. Integrated speed control switch knob; 24. Battery; 25. Potentiometer;

[0038] 30. Vacuum release self-adsorption box; 310. Self-adsorption film. DETAILED DESCRIPTION

[0039] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0040] Although relative terms such as "upper" and "lower" are used in this specification to describe the relationship of one illustrated component to another, these terms are used herein for convenience only, such as in accordance with the orientation of the illustrations in the accompanying drawings. It will be understood that if the illustrated device were flipped upside down, the component described as "upper" would become the component "lower." When a structure is referred to as "on" another structure, this may mean that the structure is integrally formed with the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via the other structure.

[0041] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used only as labels and are not intended to limit the quantity of their objects.

[0042] The present disclosure provides an air extraction device, such as Figures 1 to 7As shown, the air extraction device includes a suction cup 10 and a vacuum pump 21. The suction cup 10 includes a flexible member 12 and a base 11. The flexible member 12 is fixed to the base 11. Along the thickness direction of the suction cup 10, a penetrating air hole 110 is provided on the base 11. The side of the flexible member 12 facing away from the suction cup 10 along the thickness direction is an adsorption surface. The adsorption surface of the flexible member 12 is provided with a first convex ring 121, a second convex ring 122 and a third convex ring 123. The second convex ring 122 surrounds the first convex ring 121, and the third convex ring 123 surrounds the second convex ring 122. In the thickness direction, the second convex ring 122 protrudes from the first convex ring 121 and the third convex ring 123. The first convex ring 121 forms a first space around the first convex ring 121, and the first space penetrates the flexible member 12. The female member 12 is connected to the air hole 110; a second space is formed between the second convex ring 122 and the first convex ring 121, and a third space is formed between the third convex ring 123 and the second convex ring 122; a first notch 1210 is provided on the first convex ring 121, and the second space is connected to the first space through the first notch 1210; a second notch 1220 is provided on the second convex ring 122, and the third space is connected to the second space through the second notch 1220; a third notch 1230 is provided on the third convex ring 123, and the third space is connected to the peripheral space of the suction cup 10 through the third notch 1230; the vacuum pump 21 is connected to the air hole 110, and the vacuum pump 21 extracts gas in the enclosed space through the air hole 110.

[0043] The present disclosure provides an exhaust device, in which the suction cup 10 is used to dock with the vacuum release type self-adsorption box 30, so that the air hole 110 on the suction cup 10 is connected to the exhaust hole of the vacuum release type self-adsorption box 30, so that the vacuum pump 21 extracts the gas in the vacuum release type self-adsorption box 30 through the air hole 110, so that a negative pressure is formed in the vacuum release type self-adsorption box 30, so that the self-adsorption film 310 is deformed by the internal and external pressure difference, thereby realizing the automatic release function. In detail, when the suction cup 10 is docked with the vacuum release type self-adsorption box 30, the vacuum release type self-adsorption box 30 is first placed on the suction cup 10, and the suction cup 10 and the box body form a semi-enclosed first space, a second space and a third space, and the first space, the second space and the third space are connected to the external atmosphere through the first notch 1210, the second notch 1220 and the third notch 1230 in turn, and the airflow direction is as follows: Figure 2As shown, the bottom of the first space has an air hole 110 connected to a vacuum pump 21. The vacuum pump 21 then begins to draw a vacuum and presses down on the vacuum-release self-adsorption box 30. The gaps in the first, second, and third raised rings 121, 122, and 123 are squeezed and closed, and the semi-enclosed first, second, and third spaces, along with the interior of the vacuum-release self-adsorption box 30, become a single enclosed space. The air pressure within the enclosed space decreases and stabilizes at a certain pressure value (vacuum level). The vacuum-release self-adsorption box 30 is tightly attached to the suction cup 10 due to the pressure difference (external atmospheric pressure is higher than the pressure within the enclosed space). The self-adsorption film 310 is deformed inward by the pressure difference, separating from the film on the film and achieving vacuum release. After vacuum release is complete, the vacuum pump 21 is turned off, and the compressive force on the gaps in the suction cup 10 decreases until it disappears. The gaps in the first, second, and third raised rings 121, 122, and 123 reopen, and the enclosed space becomes semi-enclosed. External air automatically enters the semi-enclosed space, so that the air pressure inside the box reaches equilibrium with the external atmospheric pressure, the self-adsorption film 310 returns to a flat state, and the vacuum release type self-adsorption box 30 is no longer adsorbed on the suction cup 10, so that the vacuum release type self-adsorption box 30 can be removed.

[0044] In addition, in the thickness direction, the second convex ring 122 protrudes from the first convex ring 121 and the third convex ring 123, that is, the height of the second convex ring 122 is relatively high. When the vacuum release type self-adsorption box 30 is placed on the suction cup 10, the second convex ring 122 first contacts the vacuum release type self-adsorption box 30 and achieves a seal. Then, when vacuuming, the first convex ring 121 and the third convex ring 123 contact the vacuum release type self-adsorption box 30 and achieve a seal, which can enable the flexible part 12 and the vacuum release type self-adsorption box 30 to be quickly adsorbed together; when the vacuum release type self-adsorption box 30 needs to be removed, the third notch 1230 on the third convex ring 123 can be separated from the vacuum release type self-adsorption box 30 and opened before the second notch 1220 on the second convex ring 122, so that external air can quickly enter the third space between the third convex ring 123 and the second convex ring 122, and then the other notches are opened, and the air enters the second space and the first space in turn, which can achieve the effect of quickly separating the suction cup 10 from the vacuum release type self-adsorption box 30.

[0045] like Figure 4 and Figure 5 As shown, the base 11 includes an upper portion 111 and a lower portion 112, which are connected to form a base 124. The upper portion 111 and the lower portion 112 can be an integrally molded structure or a separate structure bonded together. The upper portion 111 and the lower portion 112 form a cavity 120, and at least a portion of the flexible member 12 is located in the cavity 120 to improve the airtightness between the flexible member 12 and the rigid base 11.

[0046] Among them, the base 11 can be made of PLA (polylactic acid) material or ABS (acrylonitrile-styrene-butadiene copolymer) material, and the rigid base 11 is prepared by an industrial-grade 3D printing method, that is, the upper part 111 and the lower part 112 can be formed as an integral part by 3D printing to meet the structural design of the cavity 120.

[0047] The flexible member 12 includes a first flexible portion 125 and a second flexible portion connected together along the thickness direction. The first flexible portion 125 is located on the base 11 and fills the cavity 120. The first convex ring 121, the second convex ring 122 and the third convex ring 123 are formed on the second flexible portion.

[0048] Among them, such as Figure 6 and Figure 7 As shown, the first flexible portion 125 includes a base 124, a first protruding ring 121, a second protruding ring 122, and a third protruding ring 123. The second protruding ring 122 may include a base layer 1221 and a top layer 1222. The first flexible portion 125 may be a one-piece structure, formed through a single injection molding process, or a two-piece structure bonded together. The one-piece structure provides relatively good airtightness.

[0049] Among them, such as Figure 8 As shown, the material of the flexible part 12 can be a flexible or elastic polymer material, such as rubber, silicone, etc. The preparation method of the second flexible part includes but is not limited to a mold casting method. The first flexible part 125 can be made by first injecting liquid silicone into the base 11, and the silicone fills the cavity 120 but does not fill the pit. Then the second flexible part is installed in the pit of the base 11, and the second flexible part is in contact with the liquid silicone. The composition of the injected glue is the same as that of the material of the second flexible part. After the liquid silicone is cured, the second flexible part and the first flexible part 125 are sealed and connected together to form a whole, and are completely sealed and connected to the rigid base 11.

[0050] Among them, such as Figures 9 to 11 As shown, along the height direction, the width of the portion of the cavity 120 away from the flexible part 12 is greater than the width of the portion close to the flexible part 12, that is, after the first flexible portion 125 is formed in the cavity 120 by injecting glue, the size of the bottom is greater than the size of the top, so that the first flexible portion 125 and the base 11 are limitedly embedded together; at the same time, the contact area between the first flexible portion 125 and the base 11 is increased, thereby improving the air tightness between the first flexible portion 125 and the base 11.

[0051] Since the first flexible portion 125 is injected with glue, the structure of the cavity 120 does not restrict the arrangement of the first flexible portion 125. Therefore, the structure of the cavity 120 can be set as Figure 10 or Figure 11 The structure shown enables the first flexible portion 125 to be tightly integrated with the base 11 .

[0052] Among them, such as Figure 9 As shown, the base 11 has a cylindrical shape with an outer diameter of 44 mm, the outer diameter and inner diameter of the pit can be 40 mm and 24 mm respectively; the diameter of the upper half of the air hole 110 can be 20 mm, and the diameter of the lower half of the air hole 110 can be 3 mm; the outlet diameter of the cavity 120 can be 5 mm, and the diameter of the bottom of the cavity 120 can be 20 mm.

[0053] Among them, such as Figure 10 As shown, the flexible member 12 is cylindrical in shape, with an outer diameter of 40 mm and a central cylindrical through hole of 24 mm in diameter. The raised cross-section of the top of the second protruding ring 122 is a semicircular shape with a diameter of 1.5 mm and includes a non-through second notch 1220 with a width of 1.5 mm and a depth of 1 mm.

[0054] The first protruding ring 121, the second protruding ring 122 and the third protruding ring 123 have the same width along the radial direction of the suction cup 10. Of course, the first protruding ring 121, the second protruding ring 122 and the third protruding ring 123 may also have different widths, which is not limited in the present disclosure.

[0055] In the radial direction of the suction cup 10, the width of the gap between the first protruding ring 121 and the second protruding ring 122 is the same as the width of the gap between the third protruding ring 123 and the second protruding ring 122. Of course, the width of the gap between the first protruding ring 121 and the second protruding ring 122 and the width of the gap between the third protruding ring 123 and the second protruding ring 122 may also be different, and this disclosure does not limit this.

[0056] In the thickness direction, the tops of the first protruding ring 121 and the third protruding ring 123 may be flush with each other.

[0057] In the thickness direction, the height difference between the second protruding ring 122 and the first and third protruding rings 121 and 123 can be 0.5 mm to 1 mm, that is, the height of the second protruding ring 122 above the first and third protruding rings 121 and 123 is 0.5 mm to 1 mm, for example, 0.5 mm, 0.6 mm, 0.65 mm, 0.7 mm, 0.75 mm, 0.8 mm, 0.85 mm, 0.9 mm, 0.95 mm, 1 mm, etc. Of course, the height difference can also be less than 0.5 mm or greater than 1 mm, and this is not limited in the present disclosure.

[0058] The depth of the second notch 1220 may be the same as the portion of the second protruding ring 122 that is higher than the first protruding ring 121 and the third protruding ring 123 .

[0059] The cross-sections of the first protruding ring 121 , the second protruding ring 122 and the third protruding ring 123 may be 2×2 mm or 1.5×1.5 mm squares, and the widths of the first notch 1210 , the second notch 1220 and the third notch 1230 may also be 2 mm or 1.5 mm.

[0060] like Figure 6 As shown, in the circumferential direction of the suction cup 10, the first notch 1210 and the second notch 1220 are staggered, and the second notch 1220 and the third notch 1230 are staggered. The third notch 1230 corresponds to the first notch 1210, that is, they are aligned in the radial direction of the suction cup 10. Of course, the third notch 1230 and the first notch 1210 can also be arranged in a non-aligned manner in the radial direction of the suction cup 10.

[0061] Among them, such as Figure 6 As shown, the first protruding ring 121 is provided with two first notches 1210, the second protruding ring 122 is provided with two second notches 1220, and the third protruding ring 123 is provided with two third notches 1230. The two first notches 1210 are positioned relative to each other, the two second notches 1220 are positioned relative to each other, and the two third notches 1230 are positioned relative to each other. The relative positioning means that they are aligned along the radial direction of the suction cup 10. The number of first notches 1210 and second notches 1220 can be one, two, or more. The two first notches 1210 can also be positioned non-aligned along the radial direction of the suction cup 10, the two second notches 1220 can also be positioned non-aligned along the radial direction of the suction cup 10, and the two third notches 1230 can also be positioned non-aligned along the radial direction of the suction cup 10, but this is not limited in the present disclosure.

[0062] Among them, in the circumferential direction of the suction cup 10, the angle between the first notch 1210 and the second notch 1220 can be 90°, and the angle between the second notch 1220 and the third notch 1230 can be 90°, that is, the positions of the first notch 1210 and the third notch 1230 are relatively set.

[0063] The dimensions of the flexible member 12 are suitable for vacuum release self-adsorption boxes 30 including, but not limited to, 2-inch (50.8×50.8 mm square) and 4-inch (101.6×101.6 mm square). It is understood that the dimensions of the suction cup 10 described above can be adjusted according to the dimensions of the vacuum release self-adsorption box 30, and this disclosure does not impose any limitations thereto.

[0064] like Figure 1 As shown, the suction cup 10 further includes a connector 13 , which is connected to a side of the suction cup 10 facing away from the flexible member 12 , and a channel 130 in the connector 13 is in communication with the air hole 110 .

[0065] Among them, such as Figure 1As shown, the air inlet of the vacuum pump 21 is connected to the connector 13 through the vent pipe 22 . The connector 13 can be a quick connector that is sealed and plugged into the vent pipe 22 .

[0066] Among them, such as Figure 2 As shown, the type of the connecting head 13 can be a pagoda head to improve the airtightness of the connection with the ventilation pipe 22.

[0067] like Figure 1 As shown, the vacuum pumping device also includes an integrated speed control knob 23, which can be used to control the vacuum pump 21, controlling its on / off state and output power during operation, thereby controlling the vacuum level. The speed control knob can adjust the vacuum pump 21's pumping rate, thereby adjusting the vacuum level. The vacuum level can be adjusted within a range of approximately -40 kPa to -100 kPa.

[0068] like Figure 12 As shown, the vacuum pump 21 includes a battery 24, such as a lithium battery, which powers the vacuum pump 21. A small 12V vacuum pump 21 can be used, with a drive circuit comprised of a universal integrated speed control switch and a rechargeable lithium battery (with overheat and overcharge protection modules). The 12V small vacuum pump 21 can achieve a vacuum level of approximately -50kP to -60kPa (i.e., the pressure within the vacuum release self-adsorption box 30 is approximately 41kP to 61kPa), meeting the required vacuum release performance.

[0069] like Figure 13 As shown, the vacuum pump also includes a potentiometer 25. A 12V miniature vacuum pump 21 is connected in parallel with the universal potentiometer 25, and a 12V DC power supply is used to form a drive circuit. The total resistance of the potentiometer 25 is similar to the impedance of the vacuum pump 21, and the potentiometer 25 is connected in series with a fixed resistor R to prevent the vacuum pump 21 from short-circuiting. The supporting circuit can be connected directly in series with the power supply and vacuum pump 21.

[0070] The vacuum device may include a housing, such as a rectangular parallelepiped, with the flexible member 12 of the vacuum device exposed outside the housing and the base 11 located inside the housing. When connecting the vent tube 22, the vent tube 22 is installed inside the rectangular parallelepiped housing. The housing may be filled with a shock-absorbing material, such as EPE (expandable polyethylene) pearl cotton for shock absorption. The suction cup 10 and the vacuum pump 21 may be separated from the housing by the pearl cotton to reduce the impact of the vibration of the vacuum pump 21 on the vacuum release self-adsorption box 30.

[0071] The present invention provides a dedicated vacuum pumping device for the vacuum-release self-adsorption box 30, whose core component is a suction cup 10 with an automatic opening / closing function. The suction cup 10 and a small vacuum pump 21 form a vacuum system. During vacuuming, the suction cup 10 automatically closes due to pressure, and the internal gas of the vacuum-release self-adsorption box 30 is extracted, forming a stable vacuum environment in the box. After the vacuuming is completed, the suction cup 10 automatically opens, and the external gas quickly and automatically enters the box, realizing the automatic pressure relief function, and the internal and external air pressures reach a balance, so that the self-adsorption box can be easily removed and the use is completed.

[0072] The vacuum release type self-adsorption box 30 provided by the present disclosure has the following significant advantages:

[0073] 1. The suction cup 10 has an automatic opening / closing function. The present disclosure develops a suction cup 10 that can automatically open / close and has reliable functions through novel structural design and material selection.

[0074] Second, the internal supporting circuit of the vacuum table is simple. Since the suction cup 10 can automatically release pressure, the supporting circuit only needs to drive the vacuum pump 21 and does not need to provide other additional functions.

[0075] 3. A good sealing connection is achieved inside the suction cup 10. The suction cup 10 is composed of a flexible part 12 and a rigid base 11. The connection between the two needs to be firm, reliable, stable and airtight. The present disclosure achieves these requirements through a novel structural design.

[0076] Fourth, a shock absorber is used inside the shell to improve the impact of the vibration of the vacuum pump 21 on the vacuum release type self-adsorption box 30.

[0077] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

Claims

1. A vacuum device, characterized in that: include: A suction cup, comprising a flexible member and a base, wherein the flexible member is fixed to the base; Along the thickness direction of the suction cup, the base is provided with a penetrating air hole, and the side of the flexible member facing away from the suction cup along the thickness direction is an adsorption surface, and the adsorption surface of the flexible member is provided with a first convex ring, a second convex ring and a third convex ring, the second convex ring surrounds the first convex ring, and the third convex ring surrounds the second convex ring; in the thickness direction, the second convex ring protrudes from the first convex ring and the third convex ring; a first space is formed around the first convex ring, the first space passes through the flexible member and is connected to the air hole; a second space is formed between the second convex ring and the first convex ring, and a third space is formed between the third convex ring and the second convex ring; a first notch is provided on the first convex ring, and the second space is connected to the first space through the first notch; a second notch is provided on the second convex ring, and the third space is connected to the second space through the second notch; a third notch is provided on the third convex ring, and the third space is connected to the peripheral space of the suction cup through the third notch; A vacuum pump is connected to the air hole.

2. The air extraction device according to claim 1, characterized in that A cavity is formed on the base, and the flexible member includes a first flexible portion and a second flexible portion connected together along the thickness direction, the first flexible portion is located on the base and fills the cavity; the first convex ring, the second convex ring and the third convex ring are formed on the second flexible portion.

3. The air extraction device according to claim 2, characterized in that: Along the thickness direction, the width of the cavity at a portion away from the flexible member is greater than the width of the cavity at a portion close to the flexible member.

4. The air extraction device according to claim 2, characterized in that The first flexible portion is formed by injecting a flexible polymer material liquid into the cavity and then curing the liquid. The second flexible portion is connected to the first flexible portion before the first flexible portion is cured.

5. The air extraction device according to claim 1, characterized in that: In the thickness direction, the first protruding ring is flush with the third protruding ring.

6. The air extraction device according to claim 1, characterized in that: In the circumferential direction of the suction cup, the first notch and the second notch are staggered, the second notch and the third notch are staggered, and the third notch corresponds to the first notch in position.

7. The air extraction device according to claim 1, characterized in that: Along the radial direction of the suction cup, the first convex ring, the second convex ring and the third convex ring have the same width.

8. The air extraction device according to claim 1, characterized in that: Along the radial direction of the suction cup, the width of the gap between the first convex ring and the second convex ring is the same as the width of the gap between the third convex ring and the second convex ring.

9. The air extraction device according to claim 1, characterized in that: The suction cup further includes a connecting head connected to a side of the suction cup facing away from the flexible member, and a channel in the connecting head is communicated with the air hole.

10. The air extraction device according to claim 1, characterized in that: The air extraction device further includes a shell, the vacuum pump is arranged in the shell, and a shock-absorbing material is filled between the vacuum pump and the inner wall of the shell.

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